27898020 has 120 divisors (see below), whose sum is σ = 92756664. Its totient is φ = 6994944.

The previous prime is 27898019. The next prime is 27898021. The reversal of 27898020 is 2089872.

It is an interprime number because it is at equal distance from previous prime (27898019) and next prime (27898021).

It can be written as a sum of positive squares in 4 ways, for example, as 272484 + 27625536 = 522^2 + 5256^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (27898021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27034 + ... + 28046.

Almost surely, 2^27898020 is an apocalyptic number.

27898020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27898020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46378332).

27898020 is an abundant number, since it is smaller than the sum of its proper divisors (64858644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27898020 is a wasteful number, since it uses less digits than its factorization.

27898020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 27898020 is about 5281.8576277670. The cubic root of 27898020 is about 303.2897923522.

The spelling of 27898020 in words is "twenty-seven million, eight hundred ninety-eight thousand, twenty".